<script>

    var cat1 = {
        sfas
    }
    var cat1  = {}

    /* var fn = function(){
        console.log(this.name);
    }; */
    function Cat(name, age){
        this.name = name;
        this.age = age;
        this.say = fn;
    }
    Cat.prototype.say =function(){
        console.log(this.name);
    };  

    var cat1 = new Cat();


    var fn = function(){

    };

    var fn = new Function();

    fn()
    

</script>